Generell informasjon Brønnbane navn 7324/8-1 Type Formål Status Pressemelding Faktakart i nytt vindu Hovedområde Funn EXPLORATION WILDCAT P&A lenke lenke BARENTS SEA Brønn navn 7324/8-1 7324/8-1 (Wisting) Seismisk lokalisering inline 2800 & crossline 4116 Boret i utvinningstillatelse 537 Boreoperatør Boretillatelse 1462-L Boreinnretning Bore dager 39 OMV (Norge) AS LEIV EIRIKSSON Borestart 10.08.2013 Boreslutt 17.09.2013 Frigitt dato 17.09.2015 Publiseringsdato 17.09.2015 Opprinnelig formål Gjenåpnet Innhold Funnbrønnbane WILDCAT NO OIL 1. nivå med hydrokarboner, alder MIDDLE JURASSIC 1. nivå med hydrokarboner, formasjon Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate STØ FM 25.0 398.0 Totalt målt dybde (MD) [m RKB] 930.0 Totalt vertikalt dybde (TVD) [m RKB] 930.0 Maks inklinasjon [ ] 1.6 Temperatur ved bunn av brønnbanen [ C] Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum NS grader 29 LATE TRIASSIC SNADD FM ED50 73 27' 6.18'' N Side 1 av 5
ØV grader 24 24' 15.42'' E NS UTM 8152888.62 ØV UTM 417497.27 UTM sone 35 NPDID for brønnbanen 7221 Brønnhistorie General Well 7324/8-1 was drilled on the Wisting Central prospect in the Barents Sea between the Hoop fault complex to the east and the Maud Basin to the west. The primary objective was to evaluate the Jurassic Realgrunnen Subgroup for hydrocarbons. Operations and results Wildcat well 7324/8-1 was spudded with the semi-submersible installation Leiv Eiriksson on 10 August 2013 and drilled to TD at 930m in the late Triassic(Carnian age) Snadd Formation. A 9 7/8" pilot hole was drilled down to 641 m to check for shallow gas. No significant problem was encountered during drilling and logging, but after permanent plugging cutting of the casing proved problematic and caused some down time. The well was drilled with bentonite spud mud down to 492 m and with Glydril mud from 492 m to TD. The top of the reservoir, Stø Formation was entered at 662 m, only 237 m below the seafloor and contained oil. The well is located down-flanks on the structure; hence, the upper part may have a gas-cap. Due to increased claystone content and decreased porosity/permeability at the end of the coring, the oil/water contact was not clearly defined. However, log data and pressure data suggests that the Stø and Fruholmen formations are in communication and share a common OWC at 708.3 m. Oil shows were described in a Fruholmen sandstone at 728 m and in Snadd sandstones at 775 m, 784 m and 808 m. No shows were described below this depth or above top Stø Formation. Three consecutive cores were cut in the Realgrunnen Subgroup from 662 m to 710.35 m. The total core recovery for all three cores was 47.05 m (97.3%). The core-log depth shifts were found to be +0.75 m, +1.36 m, and +0.6 m for core number 1, 2, and 3, respectively. MDT oil samples were taken at 664.54 m and 678.07 m. The reservoir temperature based on data from the MDT sampling runs was 16.35 and 17.22 C in the Stø Formation at 664.54 m and 678.07 m, respectively. The reservoir pressure was about 68.9 bar (664.54 m) and 69.97 bar (678.07 m). The gas-oil ratio determined by PVT analysis was 50 Sm3/Sm3 and the oil gravity is 0.835g/cm3. Gas chromatographic analyses of the oil sample at 664.54 m show depletion of n-alkanes compared to isoalkanes, suggesting slight biodegradation has occurred in the reservoir. MDT water samples were taken at 782.3 m. The well was permanently abandoned on 17 September 2013 as an oil discovery. Testing No drill stem test was performed. Borekaks i OD Side 2 av 5
Borekaksprøve, topp dybde Borekaksprøve, bunn dybde 494.00 929.00 Borekaksprøve tilgjengelig Borekjerner i OD Kjerneprøve nummer Kjerneprøve - topp dybde Kjerneprøve - bunn Kjerneprøve dybde dybde - enhet 1 662.0 667.4 [m ] 2 668.0 679.3 [m ] 3 680.0 710.4 [m ] Total kjerneprøve lengde 47.1 Kjerneprøve tilgjengelig Oljeprøver i OD Test type Flaske nummer Topp MD Bunn MD Væske type Test tidspunkt Prøver tilgjengelig MDT 664.00 0.00 OIL NO MDT 678.00 0.00 OIL NO Litostratigrafi Top depth Lithostrat. unit 424 NORDLAND GP 424 UNDIFFERENTIATED 500 ADVENTDALEN GP 500 KOLMULE FM 563 KOLJE FM 580 KNURR FM 590 HEKKINGEN FM 621 FUGLEN FM 662 KAPP TOSCANA GP 662 STØ FM Side 3 av 5
679 NORDMELA FM 730 FRUHOLMEN FM 772 SNADD FM Geokjemisk informasjon Dokument navn Dokument format Dokument størrelse [KB] 7221_7324_8_1_GCH_1 txt 0.02 7221_7324_8_1_GCH_10 txt 0.02 7221_7324_8_1_GCH_11 txt 0.04 7221_7324_8_1_GCH_12 txt 0.04 7221_7324_8_1_GCH_13 txt 0.05 7221_7324_8_1_GCH_14 txt 0.05 7221_7324_8_1_GCH_15 txt 0.02 7221_7324_8_1_GCH_16 txt 0.01 7221_7324_8_1_GCH_2 txt 0.02 7221_7324_8_1_GCH_3 txt 0.01 7221_7324_8_1_GCH_4 txt 0.02 7221_7324_8_1_GCH_5 txt 0.01 7221_7324_8_1_GCH_6 txt 0.02 7221_7324_8_1_GCH_7 txt 0.02 7221_7324_8_1_GCH_8 txt 0.01 7221_7324_8_1_GCH_9 txt 0.01 Logger Type logg Topp Bunn for for logg logg FMI PPC MSIP PPC EDTC 636 912 HRLA PEX GR 636 918 IBC MSIP GR CCL 425 636 ILEF CMR EDTC 642 921 LWD - ARC VIS8 489 625 LWD - SON VIS NEOS 488 636 LWD - VIS RES 635 923 MDT GR 664 867 MDT GR 664 782 ZAIT IS PPC GR 636 928 ZOVSP 35 920 Side 4 av 5
Foringinsrør og formasjonsstyrketester Type utforing Utforing diam. [tommer] Utforing dybde Brønnbane diam. [tommer] Brønnbane Slam egenvekt ekvivalent [g/cm3] CONDUCTOR 30 488.0 36 488.0 0.00 Type formasjonstest SURF.COND. 9 5/8 636.0 12 1/4 636.0 1.48 FIT OPEN HOLE 930.0 8 1/2 930.0 0.00 Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] 450 1.02 Sea Water 580 1.20 13.0 Glydril 633 1.14 19.0 KCl/Glycol 800 1.16 12.0 Glydril 930 1.20 13.0 Glydril Dato, måling Side 5 av 5